Leap means to jump quickly or suddenly, or to change abruptly from one condition or subject to another. It can also refer to the distance or height of a jump, or an abrupt increase or transition. LEAP meaning: 1. to make a large jump or sudden movement, usually from one place to another: 2. to provide help…. Learn more. Leap definition: To propel oneself quickly upward or a long way; spring or jump. leap definition: move suddenly and quickly to a place. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like "leap to someone's assistance", "leap year", "leap in the dark".